Weather on September 18 at Badlands
Badlands National Park
Based on 55 years of data from Rapid City, SD
Elevation Note: Badlands sits at 3,200 ft. Expect temperatures 11°F cooler than the data shown below, which comes from Rapid City, SD at a lower elevation.
Planning Your Visit
September 18th in Badlands National Park (via Rapid City, SD) typically brings pleasant fall weather, with average highs around 75°F and lows near 48°F — a 27°F daily swing. Over 55 years of records, the warmest September 18th was in 1998 (76°F average), while the coldest was 2010 (38°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 18th dates historically, with the wettest September 18th recording 1.55" of rain. The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.9°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Badlands? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 66°F | 53°F | 0.03" | 0" |
| 2024 | 82°F | 52°F | 0" | 0" |
| 2023 | 88°F | 62°F | 0" | 0" |
| 2022 | 85°F | 56°F | 0" | 0" |
| 2021 | 96°F | 53°F | 0" | 0" |
| 2020 | 75°F | 45°F | 0" | 0" |
| 2019 | 75°F | 55°F | 0" | 0" |
| 2018 | 71°F | 54°F | 0" | 0" |
| 2017 | 81°F | 51°F | 0" | 0" |
| 2016 | 82°F | 58°F | 0" | 0" |
| 2015 | 60°F | 46°F | 0" | 0" |
| 2014 | 90°F | 52°F | 0" | 0" |
| 2013 | 90°F | 59°F | 0" | 0" |
| 2012 | 81°F | 44°F | 0" | 0" |
| 2011 | 71°F | 52°F | 0" | 0" |
| 2010 | 43°F | 34°F | 0.1" | 0" |
| 2009 | 83°F | 51°F | 0" | 0" |
| 2008 | 89°F | 57°F | 0" | 0" |
| 2007 | 65°F | 51°F | 0.1" | 0" |
| 2006 | 50°F | 37°F | 0" | 0" |
| 2005 | 67°F | 49°F | 0" | 0" |
| 2004 | 96°F | 55°F | 0" | 0" |
| 2003 | 57°F | 36°F | 0" | 0" |
| 2002 | 64°F | 50°F | 1.55" | 0" |
| 2001 | 69°F | 48°F | 0" | 0" |
| 2000 | 90°F | 62°F | 0" | 0" |
| 1999 | 70°F | 46°F | 0.38" | 0" |
| 1998 | 94°F | 59°F | 0" | 0" |
| 1997 | 73°F | 56°F | 0" | 0" |
| 1996 | 57°F | 44°F | 0.91" | 0" |
| 1995 | 70°F | 43°F | 0" | 0" |
| 1994 | 80°F | 47°F | 0" | 0" |
| 1993 | 49°F | 43°F | 0.08" | 0" |
| 1992 | 74°F | 32°F | 0" | 0" |
| 1991 | 54°F | 26°F | 0" | 0" |
| 1990 | 74°F | 54°F | 0" | 0" |
| 1989 | 90°F | 58°F | 0" | 0" |
| 1988 | 78°F | 48°F | 0" | 0" |
| 1987 | 64°F | 38°F | 0" | 0" |
| 1986 | 58°F | 50°F | 0.23" | 0" |
| 1985 | 84°F | 48°F | 0.03" | 0" |
| 1984 | 92°F | 58°F | 0" | 0" |
| 1983 | 66°F | 32°F | 0" | 0" |
| 1982 | 72°F | 38°F | 0" | 0" |
| 1981 | 86°F | 37°F | 0" | 0" |
| 1980 | 80°F | 47°F | 0.79" | 0" |
| 1979 | 79°F | 43°F | 0" | 0" |
| 1978 | 72°F | 45°F | 0.33" | 0" |
| 1977 | 71°F | 45°F | 0" | 0" |
| 1976 | 84°F | 59°F | 0" | 0" |
| 1975 | 60°F | 46°F | 0" | 0" |
| 1974 | 84°F | 36°F | 0" | 0" |
| 1973 | 72°F | 35°F | 0" | 0" |
| 1972 | 90°F | 45°F | 0" | 0" |
| 1971 | 58°F | 36°F | 0.03" | 0" |